Was wondering if someone can help me out I can’t figure it out. I have a 2014 supercharge that keeps pushing the coolant into the reservoir. The car has 54k miles. I have changed the water pump, the front and rear cross over pipe they both blew open probably from the excessive pressure. I also have white smoke coming out of the exhaust which smells like a burnt oil. The car can idle for hours without overheating or the coolant level in the expansion tank rising. As soon as I start driving the coolant level comes up and starts spilling out expansion tank cap. I did did a combustion test on it and it’s not showing that there’s a head gasket leak. Anyone know what it could be or have experienced this before?

 

if you have smoke and overheating you might have a crack in the cylinder head thats pushing gasses in to the cooling system if you don't have exhaust gasses seems a bit weird but still wont be out of the question